also, i would make somewhere more open areas, in your case (to change the existing map as little as possible) you can remove those two 1 square blocks in central part. with that move you make open areas and also remove the 1 square passage that exists between them and central wall.

spam lanes and 1 square passages are first two things that separates great map from ok map.

its better in a way that you removed the 1 space. tho you made that 1 square block necessary since if you remove it now you make spam lane... :-P imo, first version was better, just without that 1 block :-)

i know how it is when you make maps, you get a cool idea, in your case a circular map witch has circular sections and that 1 block fits in perfectly in that format and its hard to let it go. :-)